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  1. Extending work of Saneblidze–Umble and others, we use diagonals for the associahedron and multiplihedron to define tensor products of𝐴-algebras, modules, algebra homomorphisms, and module morphisms, as well as to define a bimodule analogue of twisted complexes (typeDDstructures, in the language of bordered Heegaard Floer homology) and their one- and two-sided tensor products. We then give analogous definitions for 1-parameter deformations of𝐴-algebras; this involves another collection of complexes. These constructions are relevant to bordered Heegaard Floer homology. 
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    Free, publicly-accessible full text available September 18, 2026
  2. Feehan, Paul; Ng, Lenhard; Ozsváth, Peter (Ed.)
  3. This is a brief review of the categorification of the Jones polynomial and its significance and ramifications in geometry, algebra, and low-dimensional topology. 
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  4. We construct a mixed invariant of nonorientable surfaces from the Lee and Bar-Natan deformations of Khovanov homology and use it to distinguish pairs of surfaces bounded by the same knot, including some exotic examples. 
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